Wearing a full set of Guild Master stuff doesn't give me any bonus for the matched set perk. I got out my set of Nightingale stuff and tried it - clearly gets the boost when you put on everything.

Problem is, I got my nightingale stuff pretty early, so it isn't that good. My Guild Master set I got much later and it is a lot better.

Anyone else having this problem? Anyone know a solution?

Is there any armor in the game with similar bonuses / armor stats as the guild master set I could go get?

I have the full Linwe's set, but don't want to go to the trouble of digging it out of an unorganized chest unless I know it will be better

You aren't the only one with the issue. Regular thieves guild stuff gets the perk from what ive read however the masters set gets none. I think it will need to be a patch since everyone has run across this bug.